The most likely source is that the wheel bearings need adjusting.
Otherwise it may be one or more suspension joints.
A warped brake disc is a possibilty as well.
The cause needs finding and correcting.
Adding weight will change the resonant frequency of the handlebars, yes. But if the weight you added made that resonance closer to the problem frequency, then it can amplify them dramatically.
It is always worth experimenting with weights, but also steering dampers. Altering both can help you get rid of unwanted vibrations.
I'd be tempted to suggest it may ...
Welcome to the site. If your prop shaft needs balancing, have this done before driving the car any distance. The vibration you are feeling will be coming from either the differential or the gearbox, the reason it doesn't happen straight away is that the oil in both of these parts is cold to start with and is thicker when cold.
If left unchecked, you stand ...
A shimmy or judder when you apply the brakes can occur from one or more of several faults: an out-of-round brake disk, a heat-spotted brake disk, worn suspension bushings, and (less likely) wheel or tire issues.
Brakes are important, and whatever's wrong is not going to improve on its own. You should have the car looked at by a competent mechanic.
It could be one of several things:
Thrown belt in a tire. The makeup of a tire consists of belts which are wound around the tire inside the rubber. These provide support for the form of the tire. If the belts become delaminated inside of the rubber, it is sometimes called a "thrown belt". This can cause your tire to become lumpy or appear to have an ...
There are a couple of potential things that could do it. Ask the mechanic though if they changed the flywheel or even if he can inspect it. It sounds like the engine is out of balance. The harmonic balancer could be damaged as well.
It may be your wheel bearings. To diagnose this drive the car on a long empty straight road and turn the well left to right. When the car leans to right or left and you hear a buzzing or rumbling or any vibrations when the car is leaning to either side then it's an indication that your wheel bearings are failing
It appears the issue was the products of BM Catalysts. They were made badly and did not fit properly. I got the front pipe and catalytic converter now changed with VW genuine items and everything is working properly.
When I compared the genuine parts with BM Catalysts parts. The difference in workmanship was huge. It looked like BM Catalysts took many ...
I drive a genesis coupe for some time now I have been experiencing the same sort of issue- though through forums I have somewhat come across it being normal.
I have had my spark plugs replace have had a major emissions clean done on my vehicle as well as other maintenance things.
Engine wise its bone stock-exhaust included
I changed out an idler pulley ...